CVE-2025-6120Public exploit

Process crash via unchecked HL1 mesh access

Published Jun 16, 2025 · Updated Jun 16, 2025

Heap-based buffer overflow in Assimp 5.4.0 through 5.4.3 allows local users to crash an importing process with a crafted HL1 MDL file. The upstream report identifies unchecked accesses involving model-controlled mesh, vertex, normal, texture, and bone data, but does not isolate the exact failing statement. A local user must cause a linked application to import the supplied model; the demonstrated consequence is a sanitizer-detected process crash.

CVSS severityUnavailable
Unscored
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in Assimp 5.4.0 through 5.4.3 allows local users to crash an importing process with a crafted HL1 MDL file. The upstream report identifies unchecked accesses involving model-controlled mesh, vertex, normal, texture, and bone data, but does not isolate the exact failing statement. A local user must cause a linked application to import the supplied model; the demonstrated consequence is a sanitizer-detected process crash.

The record

CVE
CVE-2025-6120
Published
Jun 16, 2025
Updated
Jun 16, 2025
Vendor
Open Asset Import Library
Product
Assimp
Classifications
CWE-119, CWE-122, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Jun 16, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.4.0
  2. Affected versionversion=5.4.1
  3. Affected versionversion=5.4.2
  4. Affected versionversion=5.4.3

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Open Asset Import Library · Assimpversion=5.4.0; version=5.4.1; version=5.4.2; version=5.4.3

Published CVSS scores

4.8VulDBCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-122Heap-based Buffer Overflow
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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